Engraving machine



May 26, 1 925.

FIG.1

A. C. HERMANN BNGRAVING MACHINE FiledDec. 10, 1921 5 Sheets-Sheet 1 Albcrtcflemlln By a .May 26,- 1925. v 1,539,483

' A. C. HERMANN ENGRAVING MACHINE Filed Dec. 10, 1921 r 5 Sheets-Sheet 2 O 1 1 O l &q

jmwwboz Albert C. Hermann I &M 7

May 264 1925.

A. C. HERMANN ENGRAVING MACHINE "'F'ilei'bec. 10, 1921 5 Sheets-Sheet nnmn a/6 .l

\ mm Om May 26, 1925. 1,539,483

A. c. HERMANN ENGRAVING MACHINE Filed Dec. 10, 1921 5 Sheets-Sheet' 4 May 26, 1925. 1,539,483

A. C. HERMANN ENGRAV-ING 'MACHINE File e 1 ,-1921 5 Sheets-Sheet 5 FIG.17

NITD STAT-ES, PATENT eri-*irg ALBERT C. HEPIANN, QF DAYTON, 'GE-DSC, ASSIGNOR TO 'II-IE NATIQNAL CASE &EG-T' ISTEB COMBANY, OF eYTQN; QHIO ENGBAVING 1\EACHII\TE Application filed December 10, 1921, Serial N 521, &3.

TO (M 'UJ/ Lomit may concrn:

Be it known that ALBERT C. HERMANN,

a citizen of the United States, residing at ayton, in the county of Montgomery and State of Ohio, have invented Certain new and Useful improvements in Engraving Machines, o't which declare the following to b-e a clear, and eXact description. l

lhlS inventlon relates to a machine i'or engraving, and in partcular for engraving master dies used in 'ferming a number of du )licates. r

ne ot the objects of this invention is to provide a machine to take the place of' hand work formerly employed in the cutting of master dies from which impressions are made on dnplicates.

Another object O this invention is the provision eit mechanism whercby dies can be produced rapdly and eeonomically with relatively unskilled labor in place of highly skilled labor now required in cutting dies 't'or ferming numbering wheels and like objects. V

titill another object of the invention is to provide a master pattern which may be ,Care- 'fully designed by hand and executed by hand and which can be used as the guide from which the duplicate dies can be made, thus having all of the benefits o't careful hand work o-r the design and all of the ben its of machine work for turning out the lie te dies themselves.

L fiother Object of the invention is to pro- .5 ride edjustable connections between the master pattern supporting member and the work snpporting member for permitting adjustment of the work supporting member independent ei' the master pattern supporting member.

W'ith these and incidental Objects in view, the invention consists in certain novel features of construction and combination of p 'i's, the essential elenients ot' which are set i'erth in appended clainls and a preferred tonn ort embodiment of which hereinatter described with reference to the drawings which accompany and form part 'of this Specification. su Of said drawings:

Fig. 1 is a perspective view of the machine with a knurling die in the process of being engraved.

Fig. 2 is a plan view et the machme.

Fig. 3 is a detail sectional view of the follower head taken on the line 3-3 of Fig. 5.

Fig. t is. adetail sectional View of the operating lever showing the connecting pinion between the lever and shaft, taken on line t-t of Fig 16. Fg. 5 is a. 'front elevation of the machine.

Fig. 6. is a detail sectional View of the index mechanism taken on line G-j-G of Fig. 16. Fig. 7 is a detail view shown in elevation of the index plate.

Fig. 8 s an enlarged view of a knurl shown as engraved by' the machine.

Fig. shown Fig. plate.

Fig. 11 s an enlarged front view of the master plate.

' Fig. 12 is a work shatt and a detachable Inandrel for work with Various sizes of holes Fig. 13 s a sectional view taken On the line 13-.-13 of Fig. 5. 4 k

Fig. 14 is a sectional view taken on the line 14-14 of Fig. 5

Fig. 15 is a detail view of the tr'acing pin with the cap attached for the first peration On work.

'in Fig. 8. y 10 is an enlarged end V1ew of a master Fig. 16 is *a right hand elevation of the machine.

Fig. 17 is a'front elevation showing a imodified form of the machine in which a master Wheel is used instead of a 'master plate On a sliding table Fig. 18 is a, perspectlve view of themaster Wheel used in the modified form.

Described in general terms, the embodiment of the invention disclosed in Figs 1 to 16 comprises a laterally slidable pattern suppo-rting table operatively connected with 'a rotatable work support, and a tracing pin supporting member movable vertically and laterally, and Operatively connected with a 'Cutter supporting member to move the same in unisontherewith. v l

'Having reference to Figs. 1 to 1,6, the inachine disclosed therein' comprises a base upon which s mounted an upstanding bracket 81 constituting a support for a pattern supporting table 32. The bracket is provided with a dovetailed g roove slidably receiving a correspondingly shaped rib projecting from the lower s de h SUPP 9 is a side elevation of the knurl uponits supporting br'acket.

ing table. VA manually Operated lever'33 pivoted on a stud 34 on the table and bifurcated'to receive a stud 35 carried by the braoket is provided for sliding the table The supporting table 32 is Controlled in v its forward and ba ckward movements by an adjustable device consisting of a threaded ro'd'36 projecting from the rear of the tableand 'Carrying adjustable nuts 37 co- Operating witha lug .38 to control its backwarcl movement and adjustable nuts 39 to control its forward movement; The lug 38 is secured to the bracket 31. The rod 36 mayf be threaded throughout its length, if

' found desirable.

Secur'ed to the right hand side of the table 32 and extending downward is a plate Carrying a roller 46cooperating with a slot 47 formed in an arm 48. This arm s pinned to alug 49 projectingfrom the side of a disk 50 (Figs. 1, 2, 5, 6 and 16) freely mounted upon a shaft 51, and takes an oscillating r v motion from the sliding table 32.

The slot 47 in the arm 48 is formed to give an oscillating movement to the shaft 51 pro- 'portionately less than the movement of the table 32. This arm .is detachable so that other arms with slots of various formation may be used to give different Oscillating movements to the shaft for purposes herein- 'after set forth. r

A spring 52 attached to the base 30 and to a pin 53 fast in the' disk 50 always tends to move the disk ina clockwise direction.

While the disk 50 is freelymounted upon the shaft .51 its oscillating motion is conveyed to the shaft by a plungeri54 (Figs. 5, 6 and '16)'free1y fitted in a. hole in the disk.

Pinned to'the plunger is a collar 55 which Controls the inward or normalposition of the plunger, the plunger beingheld in its norm al position by a sprlng 56 *which is entwined about the plunger between a flange 57 and the side of the disk 50. The plunger is tapered at one end so as to 'faciltate its entering any one of the holes 58 in an index disk 59 'fastened to the shaft 51 by means of a' kev-760. *The variousholes in the index disk are' for the purpose of changing the.

position of thefirst disk 50 with respect to the shaft 51 to place inengraving position different .portions of the work which will hereinafter be described. The disk 50 is l'etained in its lateral position on the shaft 51 by'a collar 61. V a

The shaft 51 isjournaled in brackets 62 and 63 fastened to the base 30.' A collar 64 fastened to the shaft prevents lateral movement of the shaft to 'the left. A knurled sleeve 65 fast on the shaft 51 constitutes a means for manually rotating the shaft in indexing the workbyplacing the different holes58 in the disk 59 in 'line with the plunger 54, The left hand end of the shaft 51(Figs. 1, 5 'and 12 'is formed t receive a work piece 171 which is held fast on theshaft by 'a nut 72.

The sliding table 32 supports a master plate 73 (Figs. 15 10, 11 and 16) which carries the numer'aLcharacter or design to be engraved upon the work piece 71.' The master plate is not limited to one character but may bear two or more, 'made up of any combination of numbers or characters, and the 7 plate may be in one piece- Or sectional.

Cooperating with'the master plate is a tracing pin 76' (Figs1,-5, 14, 15 and 16) which is caused to follow the Outline of the, numeral or character on the master plate and Convey the same Outline or design to the work piece. The pin is supported in a lug projecting forwardly from a Carrying member 77 The upper end of the pin is threaded to-cooperate with a nut 78 toprovide for ertical adjustment. A cap screw 79 threaded in another lugcarried by' said member serves as a looking means for the traclng pin and ad ustable nut. The lower ,end of the pin 76 is tapered to correspond the master pattern on the work piece 71 after which the cap is removed' and the pin 7 6 following the Outline of the master plate will causethecutting tool to give an exact reproduction of the design'to the work piece.

The tracing pin Carrying member 77 has a slidable dovetailed connection With a horizontally sliding back plate 81. By this dovei tail connection between these two members the' tracing tool can be raised and lowered in following the Outline of thepattcrn *to reproduce on the work the sharp corners shown on the ,master pattern. r

no L

. Fast to the tracing pin Carrying.: member a yoke 82 (Figs. 3 and 14) which coopcrates with an oscillating cam 83 to raise and lower the tracing pin. This cam is fast to a horizontal shaft 84 which is mounted' for rocking and sliding movements.

-The back plate 81 has'a dovetail connection with a plate 88 which permts the plate to move horizontally upon lateral movement of theshaft 84. The platehas two bushings 90 and 91 which constitute bearings'for the shaft 84. Pmned to the shaft at the right of the bushing 90 is a collar 92, and at the left of the bushing 91 is a collar 93. The bushings'being between the collars will Causethe back plate 81 to move laterally with the shaft. The plate 88 is fast to an upright bracket *89 fast to the base 30, i

The shaft '84 is oscillated and moved 'lat erally by a lever 94 Which is ;tulcrumed on' a p in 95 mounted in tWo plates 96 and 97' which areheld in spaced relation at their upperends by a member 98 riveted Or other wise secured thereto. The lever 94 has teeth 99 formed on its upper edge which mesh with a pinion 100 mounted on a pin 101. This pinion engages with rack teeth 102 'formed in the side of the shaft 84. The sha'tt has a Hat surtace 103 which cooperates with the member 98 to oscillate the shal't as the lever 94 is raised and lowerec. As the lever is moved to the right or le't't it will cause the sha'ft to slide laterally in its supports.

bracket 106 pl'ojectng to the right from the plate 88 supports the right hand end of the shat't 84 together with the lever 94 and its cooperating mechanism. The plates 96 and 97 are freely mounted between the lugs 107 and 108 toswing with the shatt 84 as a piv'ot and are retained in position laterall by these lugs.

The shat't 84 extends to the left and has a. bear-ing in the cutting tool back plate 109 which has a loose dovet'ailed connection with a plate 110 fast on the upright bracket 89. This dovetail connection between these two members permts the plate 109 to Slide horizontally. The horizontal motion of the shatt 84 is conveyed to the cutting tool hack plate 109 by mechanism which reduces the movement to any proportion desired. link 111 is pvoted at the right hand end on a stud fast in the plate 81,the leitthand end of the link having a pivotal connection with an arm 112 reely mounted" upon a stud 118 fast in the plate 110. Fast to the arm 112 is a cam 114 which, as it moves in a. COUIIGClOClIWiSG direction around the pivotal point 113, will cause the plate 109 to slide toward the left, and as'the cam 114 moves in a clockwise direction the plate 109 will he moved toward the right by a spring 115 tensioned to keep the plate 109 at all times in Contact with the cam 114. The 'form of the cam is such as to give a reciproating motion to the plato 109 in any desired proportion to the movement of the tracing tool. A hardened piece 119 is inserted in the plate 109 to form a'working sur'faee for the cam.

The spring' '115 (Fig. 2) has one end attached to the plate 110 and the Other end to a. rod 116 supported in a bracket- 117 :tast on the plate 109. The left hand end of the rod 116 is threaded to cooperate with a spring tension adjusting nut 118.

Elidably mounted on the plate 109 by a vertically extending dovetail connection is a cutting tool supporting member 122. Fastened to this member is a yoke 123 (Fig. 13) which cooperates with a cam 124 slidably mounted upon the Shaft but caused to rotate with the shaft hy a key 125. This cam is' proportionately smaller in size than its companion 'cam 83101 the reason that the work 71 is proportionately smaller than the .master plate. As the tracing pin is raised and lowe-red bythe shatt 84 the cutting tool sup'porting member will be moved lesser extents in the same directions supported hysuitahle lugs 'carricd by the member 122 (Fig. 13,) 'is a Vertical spindle 125 having'a collet 127 holding a cutting tool 128. The head of the collet is tapered to eooperate with the walls of a correspondingly shaped opening .in the spin dle to grip the euttihg tool lirmly as it is drawn upward by a holt 129 which is threaded at its lower end 130 to engage a threaded hole in the Collet. The holt 129 has a fiange 131 formed near the top which bears against 'the top of the spindle to support the holt as the'collet is drawn into the tapered 'opening at the bottom of the spindle. The spindle is journaled in two bearings'182 and 133 secured in the lugs on the 'supporting member 122.

A flange 134 formed near the loweraend of the spindle bears against *an *anti-rio tion collar 135 fast in the member 122, 'to take the upward thrust of the spindlen 1 A collar 121 fast near the top 'of the spindle and' Testing' upon the bearing 132 takes the downward thrust ot' the, spindle 126. The spindle also has' an adjustable nut 136 With an antitriction washer 137 .to take up the wear caused by *the upward thrust or the spindle. The spndle 'is'rotated'at the proper speed by a pulley138 fast thereto driven by a helt 139 connected to 'any power driving means.

In order that the machine may 'not be limited to operate upon work pieces'provided with holes fitting the 'shatt 70 any auxiliary work arbor (Fig. 12) is provided to sorew on the end of the shatt 70. The small ends 14601 thesearbors upon which the work is fastened may also he made of various lengths to aeeomniodate,

.work 'of different widths.

hen an' auxiliary work arbor ie attached to theshatt '(0 the work piece 71 is located a. greater distance to the left of the bracket 62. .This necessitates moving the cutting 'tool a eorresponding distance, and in so doing it isnecessary to 'replace the piece 119 witha eorrespondingly thieker piece. l

Referringtofigs 8 and 9, the work piece or knurl may contain one or more numerals or characters engraved upon the periphery of the knurl and there, may be two or more'characters placed side by side. The two slots 147 are for the purpose of looking 'the knurl to the production 'machine arbor when using' the knurl .in re-' producing the characters upon stock pieces.

In producing knurls of different diame ters, and also figures and characters of various heights and widths, it 1S necessaryto use a master plate 7 3 and arm 48 correspond- Zing to the proportion of size between the master and the engraved character. The proportion shown 1n the drawings IS ten to One. v

, While the parts have been shown as'pro portioned to produce a character on the Work of one-tenth of the sizeof the character on the master plate, it s. to be' understood that other proportions may be employed so that the character produced may be smaller than, equal to Or larger than the character' on the master plate and that therefore the same.

master plate may be .employed to engrave characters o'f difierent sizes.

When a large ivork piece is employed it is necessary to use an arm 48 With a slot 47 shaped to effect a smaller angular rotation of the Work piece, if engraved charactersof the same height areto be produced.

In the production of engraving knurls by:

hand it is necessary to lay Off as many Spaces on the surface of the Work blank as the number of characters to be engraved. These 'Spaces are usually laidofby dividing the surface in sections by crosscuts I In the use of the machine heren described, the preliminary Work involved in laying Ofl' spaces On thework piece is dispensedwith, as the holes in the index disk 59 control the 'properspacing of the characters'produced.

When it is desired to engrave a larger or smaller ,number of characters in a single row On the Work piece,vit is only necessary to substitute an index disk provided With: as many holes as the number of characters .to be produced.

In a modified form of the invention shown in Figs. 17 and 18, a master Wheel 15 1, pro:* vided upon its periphery With the numerals or characters to be reproduced upon the Work piece or -knurl 71, is 'employed instead of the sliding table and master pattern em- -ployed in the first embodiment. This master -Wheel is fast on a shaft 155 Which lS jonr-n naled in bearings 156 and 157 mounted upon the base 158. r

' The shaft 155 is prevented from moving 'laterally in its bearings by a collar159 On its right hand end and the master Wheel and a Collar 160 near its left hand end.

' The tracing 131117 6 s caused to follow the Outline-of the figures or characters by'operating the lever 9 1, as previously described, and manually rotating' the master Wheel. The tracing pin is mounted' i'n a supporting member 77 and its Vertical motion is conveyed to the cntting tool by the shaft 84: and

its horizontal motion by the link 111, arm 112 and Cam 114, all as in the first embodi- V ment of the invention described. v 95 the' exception of a master Wheel in place. of a sliding master plate, .the mechanism'employed is identical With thatof the embodiment shown in Fi'gs. 1 to '16."

While the form 'of *mechanism herein shown r and described 'is' admirably' adapted to be nnderstood that it is -notintendedjto confine the invention 'to 'the' one form of embodiment herein disc1os/ed, for' it issus'- ceptible of embodiment in various formsall coming Withinthe scope of the claims Which follow. I j v What is claimed ist- 1. In a machine, of the class described,"

the combination of a'tracing pin Carrying member adapted to slide both horizontally and vertically, a member having a rocking and laterally slidingmotion to operate said tracing pin Carrying member, and manipu lative means for Operating said rocking and sliding jmember.

2. In a machine of the classdescribed,the i combination of' a slidab'le master pattern' supporting member, a 'manipulative means for perating said supporting member, a

worksupporting member, and means for oscillating saidworksupporting member by a movement ,of said slidable master pattern 'supporting member.

3. In a machine of the class described, the combination of 'a Lslidable master' pattern supporting member, a. manipulative means for Operating said supporting member, a rotatable work'sup porting member, means for conveying'motion from said slidable member to said rotatable member, and manipulative meansfor permitting rotation of saidlrotatable member independentpo'f said slidable 'memben n 4.' In a machine of the class described, the combination j of a slidable 'master pattern.-

snpporting member, a t manipulative ;means for operatlng' sal-d supportmg member, a

rota'table disk, means for conveying motion from'- sa d shdable member to said rotatable disk, a rotatable ork supportmg member,

and manipulative,means'for relatively connecting* said jrotatable disk with said rot'atable Work supporting member.

' 5. In a machine of the class described,

ing member, a movable. Work supporting member, and an operative connection between said members involving relatively ad j e r ta a le e me ta FO I 'to fulfillthe objects primarly-stated, it is slidablyv munted in the other of said plates, and cams On said rod for ,contrc lling the' 'm0vements of said supporting members.

20. In a machine of the class described,

a frame member, a pair ofspaced plates n slidably mounted thereon by tongue 'and groove connections, a rod journaled in said plates and laterally'immovable With respect to One of' said plate's, an operative COnnection between said pl-ates to transm'it movement fromsaid One plate to the other of said plates, a tracingpin supporting member 'slidablymounted onone of saidplates, a cutting tool supporting. member slidably *mounted in the Other of said plates, :and

cams On said rod for controiling the movements Of said'supporting members. v i

21. In a machine of the class'descrbed, a frame member, a 'pair of spaced plates slidably mounted thereon, a rod journaled in saidnplates and laterally immovable With respect to 'One Ofsaid plates, an Operative connection ;between :said piatesjto transmit movement from said One plate to the other 'of said plates, a tracing p-in supporting 'member slidably mounted On One of said plates by tongue and' groove connections, a

cutting 'tool supporting member slidably mounted 1n the Other of sald plates, by 'tongue and groove connectlons, and cams on said rod for controlling the movements of said supporting members.

22. In a machine of the class described a frame member, a pair of spa'ced plates. slidably mounted thereon by tongile and.

groove connections, a rod journaled insaid plates and laterally .lmmovablerwith respect' to one'of said plates, an Operative connection between said plates to transmit movement r plates, a 'tracing pin' supporting member' slidably mOunt-ed On one'of said plates by.

from said One plate to .the Other of said tongiie and groove connections, a' cutting tool supportmg member shdably mountedin the* Other ef said. plates by tongue and groove connections, and cams' On said :rod

forcontrolling the/movements Ofsaid sl p-j pcrting members. r A

23. In a mach'ne Of the class described,

a 'rame member, a rod journaled thereon, a

tracing pin supporting member stidably' mounted On said frame member, a cutting tool supporting member i slidably mounted On said frame member, and'c'ams On said rod for controlling the movements of' said supporting members. n

24. In 'a machine' of the class described,

a frame member, a pair' of spaced plates slidably mounted thereon, a rod journaled' in said plates and flaterally immcvabl With .respect to one of said plates, 'and op'erative connection between said plates to transmit 'movement from said one plate to the Other,

of said p1ates,'a tracing pin slidably mount'- ed On One of said plates, -a cuttingtool slid- .ably mounted 'in the 'other of said plates,

and cams On said rod for controlling the movements of said tracing pin and cutting tool.

frame member, 'a pair of spaced 'platesslidably mounted thereon, a rod journaled' in said plates and laterallyim-movable With renection between said plates to' traDSmit ALBERT C. HERM N.

25.111 a machine of the class described, a"

Spect to One of said plates, an operative coni movement from said ne plate to the Other 'of said plates, a tracing pin supporting 

